First one has three and the second one has two germ layers.
The Hydra has two germ layers. The outer layer, which is called the epidermis (ectoderm), and the inner layer, which is called the gastrodermis (endoderm).
germs layers in birds
one
3
three
Three cell layers known as the ectoderm, mesoderm, and endoderm. They are also referred to as the primary germ layers, because all of the organs and tissues of the embryo will be formed from them.
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During blastula there will be two germ layers 1)ectoderm 2)endoderm, after gastrulation , there will be three germ layers 1) Ectoderm 2) Endoderm 3) Mesoderm
No they do not. I am not certain as to whether they have 0 or 2 germ layers but it is one of the two.
Insects have one germ band that grows. There are three germ layers which can be found on most insects and are responsible for development.
They have two layers the endoderm and ectoderm.
Formation of germ layers is related to gasrtulation . When cells migrate from out side to inside , germ layers are established .
yessir
Sponges have two germ layers therefore they are diploblastic.
Phyla that have only two germ layers are Cnidaria and Ctenophora. These phyla are considered diploblastic, meaning they develop from two embryonic germ layers: endoderm and ectoderm. organs. This is in contrast to triploblastic animals, which have three germ layers (endoderm, mesoderm, and ectoderm).
the three germ layers on a squid are the ectoderm, endoderm and mesoderm
Phylum arthropoda does fall under the Protostomia clade characterized by bilateral symmetry and three germ layers.